CN101246694A - Magnetic writing head with top back pole optimization to reduce tail shield piece protrusion - Google Patents
Magnetic writing head with top back pole optimization to reduce tail shield piece protrusion Download PDFInfo
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- CN101246694A CN101246694A CNA2008100743032A CN200810074303A CN101246694A CN 101246694 A CN101246694 A CN 101246694A CN A2008100743032 A CNA2008100743032 A CN A2008100743032A CN 200810074303 A CN200810074303 A CN 200810074303A CN 101246694 A CN101246694 A CN 101246694A
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- magnetic
- utmost point
- returns
- air cushion
- trailing edge
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3109—Details
- G11B5/313—Disposition of layers
- G11B5/3143—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding
- G11B5/3146—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding magnetic layers
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/10—Structure or manufacture of housings or shields for heads
- G11B5/11—Shielding of head against electric or magnetic fields
- G11B5/112—Manufacture of shielding device
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3109—Details
- G11B5/3116—Shaping of layers, poles or gaps for improving the form of the electrical signal transduced, e.g. for shielding, contour effect, equalizing, side flux fringing, cross talk reduction between heads or between heads and information tracks
Abstract
A magnetic write head for perpendicular magnetic recording that is resistant to write pole and trailing shield protrusion. The write pole includes a magnetic return pole that is magnetically connected with the trailing shield, the return pole being resistant to deformation or recession such as from mechanically abrasive slider cleaning operations such as soda blast.
Description
Technical field
The present invention relates to perpendicular magnetic recording, more specifically, relate to the manufacture method of the write head that is used for perpendicular magnetic recording, the said write head has the top back pole design that can prevent that tail shield is outstanding.
Background technology
The core of the long term memory of computing machine is the assembly that is called as disc driver.Thereby disc driver comprises write head and the reading head that the cantilever on spinning disk, the surface by closing on spinning disk suspends and make cantilever that swing take place reading head and write head are placed into actuator on the selected circular track on the rotating disc.Reading head and write head are located immediately on the have air cushion surface slide block of (ABS).Cantilever makes slide block towards the biasing of the surface of dish, and when disc spins, the air that closes on dish moves together with the surface of dish.Described slide block depends on this pad that moves the air formation and flies on the surface of dish.When slide block rides on the air cushion, adopt write head and reading head to write magnetic transition and read magnetic transition from rotating disc to rotating disc.Reading head and write head are connected to treatment circuit according to computer program work, write and read functions realizing.
Write head generally includes and is embedded in first, second and the interior coil layer of the 3rd insulation course (insulating laminate), and described insulating laminate is clipped between the described first and second pole piece layers.Locate between the first and second pole piece layers, to form the gap at the air cushion surface (ABS) of write head, and connect described pole piece layer at the post gap place by clearance layer.The electric current that conducts to coil layer causes magnetic flux in pole piece, it makes magnetic field come out in the gap location disperse of writing at ABS place, in the magnetic track on move media, for example writes above-mentioned magnetic transition in the circular track on aforementioned rotating disc.
In recent reading head design, adopt the spin-valve sensor of giant magnetoresistance (GMR) sensor that is otherwise known as to detect magnetic field from spinning disk.Described sensor comprises the non-magnetic conductive layer that is called as wall that is clipped between first and second ferromagnetic layers that are called pinned (pinned) layer and free layer.First and second lead-in wires are connected to spin-valve sensor, thereby detect electric current by its conduction.The magnetization of nailed layer is pinned perpendicular to air cushion surface (ABS), and the magnetic moment of free layer be parallel to ABS but can rotate freely in response to the external magnetic field.Usually by with the magnetization of the exchange coupling pinning nailed layer of inverse ferric magnetosphere.
The thickness of wall be chosen as little by sensor in the mean free path of conduction electron.Rely on this setting, by the part of the interface scattering between the every person in wall and nailed layer and free layer conduction electron.When the magnetization of nailed layer and free layer is relative to each other parallel, the scattering minimum, when the magnetization antiparallel of nailed layer and free layer, the scattering maximum.The variation of scattering can make the resistance and the proportional variation of cos θ of Spin Valve, and wherein, θ is the angle between the magnetization of nailed layer and free layer.In read mode, the resistance of spin-valve sensor and the proportional variation of amplitude from the magnetic field of rotating disc.When detecting electric current by the spin-valve sensor conduction, resistance variations will cause potential change, and described potential change is surveyed and handled as playback signal.
For satisfy strengthen day by day to the data transfer rate that improves and the demand of data capacity, the research staff comes in its focus has been placed in the exploitation of perpendicular recording system.Routine longitudinal recording system, for example, the longitudinal recording system that combines above-mentioned write head is machine-direction oriented magnetic potential along the magnetic track in the plane of magnetic disk surface with data storage.This longitudinal data position is to write down by being formed at by the fringing field between a pair of magnetic pole of writing separated.
On the contrary, perpendicular recording system then is the magnetization that has perpendicular to the orientation on the plane of disk with data recording.Disk has the soft magnetic underlayer that covers by thin Hard Magnetic top layer.Perpendicular write head has and has writing the utmost point and having the utmost point that returns in much bigger cross section of very little cross section.The high-intensity magnetic field of high concentration is launched from writing the utmost point along the direction perpendicular to magnetic disk surface, thereby makes the magnetization of Hard Magnetic top layer.Afterwards, formed magnetic flux returns the utmost point by the transmission of soft lining thereby be back to, and at this place, described magnetic flux fully launches and dies down, thereby is back in the process of returning the utmost point when back passing the Hard Magnetic top layer at it, can not wipe by writing the signal of utmost point record.
In order to improve the field gradient of so vertical magnetic writing head, some researchers are being devoted to develop a kind of write head that has the tail magnetic shield.Such shielding part pulls to himself with write field, thereby write field is tilted by certain angle, increases field gradient and switch speed thus.But, have been found that the manufacturing process that adopts has caused the outstanding of these tail shields in the process of structure slide block.For example, have been found that grinding the abrasion technology (for example, soda spray technology (soda blast)) that (lapping) be used to clean slide block afterwards to make the surrounding structure depression, thereby make tail shield outstanding.
Such tail shield is outstanding may to reduce the write device performance, and may cause contacting of head and disk under the low-down flying height of current write head.Therefore, need a kind of outstanding write head of this tail shield that can reduce to design strongly.
Summary of the invention
The invention provides and a kind ofly avoid tail shield and write extremely outstanding write head design.The said write head has top back pole, and described top back pole is designed to resist abrasion slide block clean operations such as soda injection, and not from described air cushion surface generation deformation or generation depression.Top back pole has the larynx height (throat height) of increase according to an embodiment of the invention, and it provides increased intensity with opposing depression or deformation for the described utmost point that returns.
Described top back pole can also be configured to have the narrow width of seeing from air cushion surface (ABS).The width of this reduction has improved and has returned the resistivity of extremely machinery being brought out deformation, has also advantageously reduced the crack in the protective layer of alumina of using above or the formation in space.
In another embodiment of the present invention, described top back pole can be the two-stage structure that comprises base part and main pole part.By can be from described top back pole base extension to the top write coil the strong hard alumina filled layer of part support described base part.
After having read following detailed description of preferred embodiments in conjunction with the accompanying drawings, these and other feature and advantage of the present invention will become apparent, and adopt similar Reference numeral to represent similar elements in the accompanying drawings all the time.
Description of drawings
Want to understand essence of the present invention and advantage more fully, and preferably use pattern, can be with reference to the following detailed description of reading in conjunction with the accompanying drawings, described accompanying drawing is not to draw in proportion.
Fig. 1 is the synoptic diagram that can implement disk drive system of the present invention;
Fig. 2 is the ABS figure of the slide block that obtains of the 2-2 line along Fig. 1, and it shows magnetic head position thereon;
Fig. 3 is the 3-3 line sectional view that obtain and that be rotated counterclockwise the magnetic head according to an embodiment of the invention of 90 degree along Fig. 2;
Fig. 4 is the ABS figure of the write head that obtains of the 4-4 line along Fig. 3;
Fig. 5 is the ABS figure that returns the utmost point and protection coating, and its crack that shows head of the prior art forms;
Fig. 6 is the ABS figure that returns the utmost point and protective seam according to an embodiment of the invention; And
Fig. 7 is the sectional view according to the write head of alternative of the present invention.
Embodiment
Following explanation has provided the enforcement most preferred embodiment of the present invention of current design.Provide this illustrative purposes and be General Principle of the present invention is described, rather than for inventive concept required for protection is defined in this.
With reference to figure 1, show and implement disc driver 100 of the present invention.As shown in Figure 1, on main shaft 114, support at least one rotatable disk 112, and make described at least one rotatable disk 112 rotation by magnetic disk drive motor 118.Magnetic recording on each disk has the form of the circular pattern of the concentric data magnetic track (not shown) on the disk 112.
At least one slide block 113 be in disk 112 near, each slide block 113 is supported one or more head stacies 121.Along with disk rotation, slide block 113 is radially inside and outside moving on magnetic disk surface 122, thus the different magnetic tracks of the disk that head stack 121 can be visited write anticipatory data.Each slide block 113 is connected to actuator arm 119 by cantilever 115.Cantilever 115 provides slight elastic force, thereby makes slide block 113 abut against magnetic disk surface 122 biasings.Each actuator arm 119 is connected to actuator mechanism 127.Actuator mechanism 127 shown in Figure 1 can be voice coil motor (VCM).VCM comprises the coil that can move in fixed magnetic field, the motor current signal control by being provided by controller 129 of direction that coil moves and speed.
In the operating process of disk storage system, being rotated between slide block 113 and the magnetic disk surface 122 of disk 112 formed air cushion, and it applies upward force or castering action to slide block.Thereby the slight elastic force of air cushion balanced cantilever 115 in the normal operation process, and support slipper 113 leaves panel surface and is in the magnetic disk surface top slightly with a little substantially invariable interval.
In operation process, by the control signal that control module 129 generates, for example access control signal and internal clock signal are controlled each parts of disk storage system.Typically, control module 129 comprises logic control circuit, storing mechanism and microprocessor.Control module 129 generates control signal, and to control various system operations, for example the head on CD-ROM drive motor control signal on the line 123 and the line 128 is located and the tracking control signal.Control signal on the line 128 provides the distribution of current of expection, thus moving slider 113 best, and be located anticipatory data magnetic track to the disk 112.Utilize record channel 125 to realize travelling to and fro between the write signal of write head and reading head 121 and the transmission of reading signal.
Can see the orientation of the magnetic head 121 in the slide block 113 in more detail with reference to figure 2.Fig. 2 is the ABS figure of slide block 113, can see, comprises that the magnetic head of induction write head and read transducer is positioned on the trailing edge of slide block.Diagram among the above-mentioned explanation of typical disk storage system and appended Fig. 1 is only done the representative illustration purposes.Obviously, disk storage system can contain a large amount of disks and actuator, and each actuator can be supported some slide blocks.
With reference now to Fig. 3,, can in write head 302, implement the present invention.Write head 302 comprise magnetic write the utmost point 304 and first or bottom magnetic return the utmost point 306.Can be building up on the magnetic forming layer 308 writing the utmost point 304.Can the bottom be returned the utmost point 306 and be shaped layer 308 and write the utmost point 304 magnetic and be connected by the first magnetic post gap structure 310.Writing the utmost point 304 and first returns the utmost point and extends to air cushion surface (ABS).Magnetic pedestal 312 can extend from first trailing edge that returns the utmost point 306 at the ABS place.This pedestal can play and prevent that stray magnetic field from arriving at the effect of magnetic medium (not shown) unintentionally.Can be by return the utmost point 308, first post gap 310, shaping layer and pedestal 312 such as the material construction first of NiFe or CoFe.Writing the utmost point 304 can be made of the high magnetic moment magnetic material such as CoFe, and preferably has the stepped construction that comprises the CoFe layer of separating by the non-magnetic material thin layer.
Still with reference to figure 3, write head 302 comprises first and second coiler parts 314 and 316 shown in the sectional view of Fig. 3, and it can be made of the conductive material such as Cu.Described first and second coiler parts 314 and 316 can be the upper and lowers of common spiral winding, perhaps can be independent pancake coils.First coiler part 314 is embedded in the dielectric substance 318, and dielectric substance 318 can be the combination of (hard baked) photoresist that cures firmly and alumina filled layer.Second or upper coil part 316 be embedded in the upper coil insulation course 320, as shown in Figure 3, upper coil insulation course 320 photoresist for curing firmly.Write head 302 can comprise other non magnetic electrical isolation packed layers, for example, and at the aluminium oxide (Al that is shaped between layer 308 and the ABS
2O
3) packed layer 322, and be positioned at the top complanation packed layer 324 that writes the utmost point 304 and be shaped layer 308.
With reference to figure 3 and Fig. 4, the said write utmost point comprises tail magnetic shield 326, separates by tail gap 328 and the trailing edge that writes the utmost point 304.Tail shield 326 can be made of the magnetic material such as NiFe or CoFe, and the tail gap can be by such as aluminium oxide (Al
2O
3), the non-magnetic material of Rh etc. constitutes.
Second or top back pole 330 contact tail shields 326, and as shown in Figure 3, second returns the utmost point 330 is connected tail shield 326 with the second post gap part, 332 magnetic.Therefore, can see, tail shield 326, write the utmost point 304 with return the utmost point 306 all in the zone of removing from ABS mutual magnetic be connected.The protective seam 334 that is made of (for example) aluminium oxide can be provided on the top of top back pole 330, and the element that writes the utmost point 302 with protection does not weather or other infringements.
With reference to figure 3, tail shield 326 and packed layer 324 have copline surface 336, and copline surface 336 provides and can allow part position, front portion (or aditus laryngis (the throat)) substrate thereon of top back pole 330.Tail shield has the high TH1 of larynx that measures to its trailing edge from ABS.Top back pole 330 has the high TH2 of larynx that measures from ABS.As can be seen, the surface 336 that forms by the trailing edge of packed layer 324 and tail shield 326 of top back pole contact.Thereby the high TH2 of larynx 330 breaks away from surface 336 point tapered on online Figure 31 6 is measured from ABS to the top back pole.In other words, FH2 is by the length definition of the part of the surface in contact 336 of top back pole 330.
Just as what partly discuss in background technology of the present invention, existing write head is subjected to the outstanding influence of tail shield.In the prior art write head, adopt abrasion cleaning procedure to clean ABS such as the soda spray technology.Because rodent cleaning procedure pushes away and hits top back pole 330, cause it to be recessed into (to right side depression shown in Figure 3) in the ABS, thereby damage.As can be seen, tail shield 326 is supported by stone (being made of aluminium oxide) packed layer 324.Therefore, hard alumina filled layer 324 has avoided shielding part 326 by distortion of soda spraying or depression.But the photoresist packed layer 320 that cures firmly that covers the upper coil part does not have and alumina filled layer 324 approaching hardness or ability of anti-deformation.Therefore, packed layer 320 can't support that well top back pole 330 does not produce deformation as packed layer 324 protection tail shields 326.If not by novelty provided by the invention return utmost point design, top back pole 330 will produce deformation and depression at ABS place, thereby cause tail shield to be given prominence to.
With reference to figure 3 as can be seen, the high TH2 of the larynx of top back pole is quite big.The high TH2 of this big larynx prevents that the pole tip part of top back pole 330 from the abrasion clean operation that sprays such as soda deformation taking place.The high TH2 of the larynx of top back pole 330 is preferably greater than 5 times of the high TH1 of larynx that equals tail shield.More preferably, TH2 can be about 25 times of TH1.For example, the high TH1 of tail shield larynx can be about 100nm, and the high TH2 of larynx of the top back pole of measuring from ABS 330 can be about 2500nm or greater than 2500nm so.
With reference now to Fig. 4,, top back pole 330 have at the ABS place than the width W 2 of tail shield 326 narrow the width W 1 of Duoing.For example, width W 1 can be less than 1/2W2.The narrow width of this of top back pole 330 has reduced the surface area that soda injection (or other technologies) can act on, thereby has further reduced being sprayed and the depression of initiation by soda of top back pole 330.Width W 1 can be 1.5-2.5 a times of (for example) its stack height thickness SH from its trailing edge to its leading edge measurement.
Except the depression of avoiding top back pole 330, the width of this reduction of top back pole 330 also provides another advantage.With reference to figure 5 as can be seen, can return deposit protective seam 502 on the utmost point 504, return the utmost point 504 and be formed on the tail shield 506.The deposit of protective seam (for example aluminium oxide) may cause crack or the space 508 shown in the dotted line among Fig. 5.Because at the aluminium oxide 502 that returned on the utmost point 504 deposit, thereby the pattern that returns the utmost point makes the aluminium oxide of deposit form in certain crack or space 508 of a bit assembling of returning on the utmost point.If return extremely widely, this convergent point will be in sizable distance of returning on the utmost point so.Because the removal speed difference of different materials, thus grind or reactive ion etching (RIE) afterwards, these cracks 508 become even are more obvious.Such crack or space 502 are undesirable, because they provide the place for the gathering of chip, thereby may promote the erosion of write head.
But with reference to figure 6, because narrow from ABS top back pole 602, thereby any crack or space 604 are all very near the some place convergence of top back pole 602.In fact, crack convergence place can provide protection to them thus very near top back pole in the slide block processing procedure, makes it not to be subjected to grind or the influence of RIE, thereby can not expose.
Now, with reference to figure 7, comprise the double-deck packed layer 702 of novelty according to the write head 700 of alternative of the present invention.This pair of lamina packed layer can comprise the photoresist coil covering 704 that cures firmly and preferably by aluminium oxide (Al
2O
3) the hard packed layer part 706 that constitutes.Top back pole structure 708 can be a two-stage structure, and this structure comprises base part 710 that is arranged on the ABS place and the major part 712 of extending towards the 3rd post gap part 714 from pedestal 710.Can in common composition and plating step, form the 3rd post gap part 714 and base part 710 together.
Pedestal 710, post gap 714 and major part 712 can be made of magnetic materials such as NiFe, CoFe, and they can be identical or different materials.As can be seen from Figure 7, hard packed layer part 706 supporting base parts 710 are resisted soda for it and are sprayed or other cleaning procedures.Because layer 706 (being preferably aluminium oxide) are stone, thereby it provides very effective support for pedestal 710.On the other hand, main basal base part 712 extends rearward to post gap part 714 always, and therefore the support of resisting the deformation that is caused by cleaning procedure of himself is provided.Therefore, embodiment shown in Figure 7 provides effective protection of inhibition tail shield depression (similarly, suppress write extremely outstanding).
Although described various embodiment, should be appreciated that these embodiment provide by way of example, its purpose is not to be to provide restriction.To those skilled in the art, other embodiment that fall within the scope of the invention also can become apparent.Therefore, scope of the present invention and extension should not be subjected to the restriction of any above-mentioned one exemplary embodiment, but should be only according to claim and be equal to important document and define.
Claims (21)
1. magnetic writing head comprises:
The magnetic that has towards the end of air cushion surface setting writes the utmost point;
The magnetic tail shielding part that separates by the non magnetic tail gap and the said write utmost point, described tail shield has trailing edge, and have the leading edge and the trailing edge relative that are exposed to described air cushion surface place, the larynx height of the leading edge of described tail shield and the distance definition tail shield between the trailing edge with described leading edge; And
Contact the described trailing edge of described tail shield and have the non-magnetic packed layer on a surface, the described trailing edge of the described surface of described packed layer and described tail shield forms the copline surface; And
In the high zone of utmost point larynx is returned in definition, return the utmost point with the surperficial magnetic that contacts of described copline, the larynx that the described larynx height that returns the utmost point is described tail shield at least is high 5 times.
2. the utmost point that writes according to claim 1, wherein, the described utmost point that returns returns in the high zone of utmost point larynx gradually away from described copline surface surpassing.
3. the utmost point that writes according to claim 1, wherein, the described utmost point larynx height that returns approximately is high 25 times of described tail shield larynx.
4. the utmost point that writes according to claim 1, wherein, the described width that has from described air cushion surface that returns, this width is significantly less than the width from described air cushion surface of described tail shield.
5. the utmost point that writes according to claim 1, wherein, described returning has width W 1, described tail shield has width W 2, and wherein W1 less than 1/2W2.
6. according to the described magnetic writing head of claim 1, wherein, described non-magnetic packed layer comprises aluminium oxide.
7. one kind is used for the magnetic writing head that vertical magnetic data writes down, and comprising:
Have the magnetic that is arranged at the terminal of air cushion surface place and has trailing edge and write the utmost point;
Have to be arranged on and return the utmost point towards the terminal of an end place of described air cushion surface setting with away from first magnetic of the end of described air cushion surface setting;
Described return the utmost point return the first magnetic post gap structure that the utmost point contacts away from the end of described air cushion surface setting with described;
The magnetic forming layer that the said write utmost point is connected with the described first magnetic post gap structure magnetic, described shaping layer is recessed from described ABS;
Return the first conductive coil part of extending between the utmost point at described magnetic forming layer and described first magnetic, described coil is by first insulation course and described shaping layer, first returns the utmost point and first post gap partly separates;
Close on the magnetic tail shielding part that the said write utmost point forms, described magnetic tail shielding part separates by the described trailing edge of the non magnetic tail clearance layer and the said write utmost point, described tail shield has the trailing edge extremely opposite with said write, and have the leading edge that is exposed to described air cushion surface place and the trailing edge opposite, the leading edge of described tail shield and the distance definition tail shield larynx height between the trailing edge with described air cushion surface;
Contact the hard non-magnetic packed layer of the trailing edge of described tail shield, described non-magnetic packed layer has a surface, and the described surface of described hard non-magnetic packed layer and the described trailing edge of described tail magnetic shield define the copline surface together;
Be arranged on the second conductive coil part on the described copline surface; And
Have the front end that is arranged on described air cushion surface place and return the utmost point with second magnetic of described air cushion surface back end opposite, described second magnetic return have towards the first that contact with described copline surface of described air cushion surface setting with leave the second portion that extend on described copline surface on described second coiler part, utmost point larynx height is returned in the described second length definition second of returning the first of the utmost point, and described second to return utmost point larynx height be high 5 times of described tail shield larynx at least.
8. magnetic according to claim 7 writes the utmost point, and wherein, described second to return utmost point larynx height approximately be high 25 times of described tail shield larynx.
9. magnetic according to claim 7 writes the utmost point, and wherein, described hard non-magnetic packed layer comprises aluminium oxide.
10. magnetic writing head according to claim 7 also comprises making described second to return the second magnetic post gap structure that the utmost point is connected with the described layer magnetic that is shaped in the zone of removing from described air cushion surface.
11. a magnetic writing head that is used for perpendicular magnetic recording comprises:
Have the magnetic that is arranged at the terminal of air cushion surface place and has trailing edge and write the utmost point;
The tail magnetic shield extremely adjacent with said write, described tail magnetic shield has the leading edge that is arranged on described air cushion surface place and the trailing edge opposite with described leading edge, distance definition tail shield larynx height between described leading edge and the trailing edge, described tail shield also have extremely opposite with said write and extend to the trailing edge of described trailing edge from described leading edge;
The non magnetic tail gap that the described trailing edge of the described tail shield and the said write utmost point is isolated;
Contact the described trailing edge of described tail shield and leave the first non-magnetic packed layer that described air cushion surface extends, described first packed layer has the surface that forms the copline surface with the described trailing edge of described tail shield;
First magnetic that extends from the described trailing edge of described tail shield returns utmost point part;
With described first return utmost point part magnetic be connected and leave that described air cushion surface extends second return utmost point part; And
Be arranged on surperficial and described second second packed layer that comprises aluminium oxide that returns between the utmost point part of described copline, described second packed layer contacts described first and returns utmost point part.
12. write head according to claim 11, wherein, described second packed layer supports described second and returns utmost point part, to suppress depression.
13. the utmost point that writes according to claim 11 comprises that also passing described copline surface and described second magnetic returns conduction write coil between the utmost point part.
14. the utmost point that writes according to claim 11 comprises that also passing described copline surface and described second magnetic returns conduction write coil between the utmost point part, and wherein said second packed layer returns the utmost point from described first and partly extends to described coil.
15. the utmost point that writes according to claim 11, also comprise and pass the described copline surface and the described second conduction write coil that returns between the utmost point, and comprise the photoresist insulation course that cures firmly around at least a portion of described coil, and wherein said second packed layer returns the utmost point from described first and partly extends to described coil.
16. a write head that is used for perpendicular magnetic recording comprises:
Have the magnetic that extends to the terminal of air cushion surface and have trailing edge and write the utmost point;
Bottom magnetic with the end that extends to described air cushion surface returns the utmost point, and described bottom magnetic returns the utmost point and is connected with said write utmost point magnetic in leaving the zone of described air cushion surface;
The described bottom of process magnetic returns the first conductive coil part on the utmost point;
Be arranged on the tail shield that described air cushion surface place and the described trailing edge by the non magnetic tail gap and the said write utmost point separate;
Close on the first alumina filled layer that described tail shield forms;
Have leading edge that is arranged on described air cushion surface place and the top magnetic that leaves the trailing edge of described air cushion surface setting and return the pole base part;
Be formed on the described first alumina filled layer and and return the second alumina filled layer that pole base trailing edge partly contacts with described top magnetic; And
Contact that described magnetic returns pole base part and the top magnetic that extends returns utmost point major part on the described second alumina filled layer.
17. magnetic writing head according to claim 16 comprises that also passing described top magnetic returns the second conductive coil part between utmost point major part and described first packed layer.
18. magnetic writing head according to claim 16, comprise that also passing described top magnetic returns the second conductive coil part between utmost point major part and described first packed layer, wherein, described second packed layer extends to the described second write coil part from described top back pole base part.
19. magnetic writing head according to claim 16, wherein, described top magnetic returns utmost point major part and returns utmost point magnetic with the said write utmost point with described bottom magnetic and be connected in the zone of removing from described air cushion surface.
20. magnetic writing head according to claim 16, comprise that also passing described top magnetic returns the second conductive coil part between utmost point major part and described first packed layer, and comprise around the photoresist insulation course that cures firmly of at least a portion of described second conductive coil part.
21. magnetic writing head according to claim 1, wherein, described returning has width W 1 and stack height thickness SH, and wherein, W1 is 1.5 to 2.5 times of SH.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/675,516 | 2007-02-15 | ||
| US11/675,516 US7835111B2 (en) | 2007-02-15 | 2007-02-15 | Magnetic write head with upper return pole optimization for reduced trailing shield protrusion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101246694A true CN101246694A (en) | 2008-08-20 |
| CN101246694B CN101246694B (en) | 2011-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100743032A Active CN101246694B (en) | 2007-02-15 | 2008-02-15 | Magnetic writing head with top back pole optimization to reduce tail shield piece protrusion |
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| Country | Link |
|---|---|
| US (1) | US7835111B2 (en) |
| CN (1) | CN101246694B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594095A (en) * | 2013-11-13 | 2014-02-19 | 宁波市鄞州科启动漫工业技术有限公司 | Vertical magnetic recording head |
Families Citing this family (38)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7322095B2 (en) * | 2004-04-21 | 2008-01-29 | Headway Technologies, Inc. | Process of manufacturing a four-sided shield structure for a perpendicular write head |
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| CN103594095A (en) * | 2013-11-13 | 2014-02-19 | 宁波市鄞州科启动漫工业技术有限公司 | Vertical magnetic recording head |
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| Publication number | Publication date |
|---|---|
| US20080232000A1 (en) | 2008-09-25 |
| CN101246694B (en) | 2011-03-23 |
| US7835111B2 (en) | 2010-11-16 |
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